Improvement in sewing-machine for sewing leather



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INVENTOR WITNESSES 5%/ M462 z @timbri States @sind 'WILL IAM WWILSONRUSSELL, OF 'IEPIC, MEXICO.

Letters Patent No. 86,695, elated Februar/ry 9, 1869.

IMPROVEMENT IN SEWING-MACIIINE FOR SEWING LEATHER.

The Schedulereferred to in these Letters Patent and making pait of thesame.

To all whom 'it may concern y Y A materials; and this I effect in partby the employment of an awl, which rst pierces the leather for thepassage of the needle. l

This needle is passed into the same h ole by an arrangement of cams,which produce a peculiar swinging motion of the head of the machine, andthey may also be` regulated seas to 'give-a long or short stitch, as de;

My improvement also consists in a peculiar movement of the hook orlooper, which takes the thread from the needle and holds it until theneedle leaves the leather, then advances and forms a loop for the awl,and retires as soon as the point of the awl passes the loop, so that theleather can be fed at the same time the thread is tightening around theawl. The presser-footis lifted at the instant of feeding the leathereach time.

To morefully explain my invention, reference is had to the accompanyingdrawings, forming a part of this specification, of which- Figure l,sheet l, is a side elevation of my machine, showing a section of aportion.

Figure 2, sheet l, is a front-end view. Figure 3, sheet 2, is anotherside view, showing the cams for swinging the head.

, Figure ,4, sheet 2, is an end view, showing the mechanism foroperating the hook or louper.

Similar letters of reference in each of the figures indicate like parts.

A is a base-plate, which supports the mechanism, and which may be rmlyfastened to a stand or table.

From this plate thc bent arm B rises, and has the boxes O C fastened atthe top.

The driving-shaft D turns in these boxes, and carries thebevelled-gearwheel E.

This wheel operates the combined bevel and spurwheel F, which, in turn,drives the spur-wheel G. This wheel is made double, as shown in iig. 2,so as to have but one bearing, which is between the two parts of thewheel.

This device allows a crank-pin, c, to be placed on each side ofthedouble wheel G, which, during its rotation, imparts a rectilinear motionto the'vertical slides H and I, each of which has a transverse slottedhead, J, in which the pin works, as shown.

The slide H carries the needle K, and the slide I carries the awl L, .bywhich the leather is pierced for the passage of theneedle.

The head M, in which work the double gear-wheel G and the two slidesHand I, is pivoted on the regulating-screw N, and, at the opposite side,on a bearing, shown in dotted lines at O.

The whole head may thus swing back and forward in the direction of theline of stitching, so that the awl may rst pierce a hole, and then,after it leaves the leather, the head swings forward to allow the needleto enter'the hole. l

To effect this swinging motion, two plates or cams, P and R, are placedon the 'back of the wheel F, these plates forming projections ofdifferent elevations. l

An arm, S, is bolted to the swinging head, and carries, at its upperend, two loose rollers or wheels, T. and U, which are moved back by theprojections before mentioned, and thus swing the head.

The distance it moves, andthe length of the stitch, are regulated by thesize of the roller T, which may be ,easily changed when desired.

The hook or looper V, which forms the stitch, is keyed, or otherwisefastened, to the rock-shaft W, extending along the bottom plate, andhaving a crank, X, at the end.

Thiscrankis -connected with the leverY by the rod Z.

The lever is operated by a cam, b, `on the drivingshaft, shown clearlyat fig. 4. A collar, c, is fastened to the shaft W, and has an obliqueslot, d, cut in it, .into which the end of a guide, e, projects. Thiscauses the shaft. to slide forward at each partial rotation, carryingthe hook V and the loop of the thread, so that as the awl pierces theleather, it also passes through this loop, andholds it after the hookrecedes.

The spool of thread is mounted, yas shown at j', and the thread passesfrom it throughthe lower part of the head M, and from thence 'throughthe endof an arm,

y, which is pivoted at 7i, and is forced down by the' hook t'.

This hook is attached to the slide H, and, by forcing the arm down,leaves the thread loose and without tension when the needle passesthrough the leather, so that a loop may be readily formed.

A spring, k, raises the lever or arm g, when the nee dle-bar rises, andreleases it, so that the thread again becomes tense as the stitch isbeing tightened.

A pin, m, on the needle-bar or slide, raises the presser foot, by comingin contact with the bent arm n, just as the needle reaches its greatestelevation, and the leather is fed by the swinging of thehead-before theawl leaves theleather. l

The operation of my machine is as follows:

As the awl approaches the leather, the roller T comes in con tact withthe projecting plate P, andswings the head M back towardv the line ofstitching. The awl then passes through the leather, the needle rising atthe same time, and, just at the end of its upward movement, raising thepresser-foot, as beforedescribed. At' this instant the roller Uv isforced out by the projection R, and swings the head still further, thusfeeding the leather so far that when the head is moved'to its forwardposition, the needle can enter the awl-hole in .its next descent. i

f To form the stitch, the needle passes through the hole beforementioned, and as it rises, the thread being loose, a loop isformed. Atthe same instant the hook Vis advanced by the mechanism beforedescribed, and takes thepioop as the needle leaves the leather, and, by

lthe traversing of the-shaft, as already described, carries it forward,so that when theawl descends, it enters this loop, and holds it when thehook iswithdrawn, in order that whenthe needle descends again, it mayenter the loop at the same time that the awl is withdrawn, thus` formingthe stitch by linking veach loop intothe previous one, the thread beingdrawn around the awl by the arm` g and spring k, so as to tighten thestitohf just made, before the needle descends again to form a new one',

Having thus described my invention,

What I claim, andfdesire to secure by Letters Patent, is

1. In combination 'with the swinging head M, the

the presser, and the awl moves the materialthe lengthv of a. stitch,before withdrawing from the hole it has made, to give place to theneedle, substantially as described. In witness whereof, I have hereuntoset my hand and seal.

WILLIAM WILSON RUSSELL.' [L. s.]

Witnesses:

GHARLEs DIX,

'J os. W. HALE,

ISAAC V 'FowLEla

